-90.09% is the change from 979 to 97
Calculation steps:
[( 97 - 979 ) ÷ 979] x 100 = -90.09%
Formula
Percentage change = [(97 - 979) / 979] x 100
Subtract the new number by the original number
97 - 979 = -882
-882 ÷ 979 = -0.9009193054136875
-0.9009193054136875 x 100 = -90.09%